4) Sweden (CPI score: 87)

Scandinavian nation Sweden is a constitutional monarchy and a parliamentary democracy. The country has four fundamental laws, which together form the constitution. These laws are: the Instrument of Government, the Act of Succession, the Freedom of the Press Act and the Fundamental Law on Freedom of Expression.

3) Finland (CPI score: 89)

The Constitution of Finland defines the nation’s political system. According to the Constitution, the President of Finland is the head of state. In this parliamentary democracy, the prime minister is the most powerful politician.